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MagicSpark

Help with DLL struct and call

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MagicSpark

Hello,

can someone help me out with some DllCall in AU3.
The relevant source of function and struct definition are as follows (in slightly modified form):

typedef struct
{
    char    *host;
    char    *key;
    char    *value;
}
test_sender_value_t;

/******************************************************************************
 * Parameters: address   - [IN] server address                                *
 *             port      - [IN] server port                                   *
 *             source    - [IN] source IP, optional - can be NULL             *
 *             values    - [IN] array of values to send                       *
 *             count     - [IN] number of items in values array               *
 *             result    - [OUT] the server response/error message, optional  *
 *                                                                            *
 * Return value: 0 - the values were sent successfully, result contains       *
 *                         server response                                    *
 *               -1 - an error occurred, result contains error message        *
 *                                                                            *
 ******************************************************************************/
TEST_API int test_sender_send_values(const char *address, unsigned short port, const char *source, const test_sender_value_t *values, int count, char **result);


In AutoIt I use the following code to build the struct and call the dll:

Global $struct = DllStructCreate("ptr ptrtostring1;ptr ptrtostring2;ptr ptrtostring3;")

Global $string1 = DllStructCreate("char host[255];")
DllStructSetData($string1, "host", "Test_Client")
DllStructSetData($struct, "ptrtostring1", DllStructGetPtr($string1))

Global $string2 = DllStructCreate("char key[255];")
DllStructSetData($string2, "key", "clientver")
DllStructSetData($struct, "ptrtostring2", DllStructGetPtr($string2))

Global $string3 = DllStructCreate("char value[255];")
DllStructSetData($string3, "value", "123456")
DllStructSetData($struct, "ptrtostring3", DllStructGetPtr($string3))

Global $aCall = DllCall("C:\temp\test.dll", "int", "test_sender_send_values", _
    "str", "192.168.1.2", _
    "int", 80, _
    "str", "192.168.1.3", _
    "ptr", DllStructGetPtr($struct), _
    "int", 1)
If @error Then
    ConsoleWrite("Error: " & @error & @CRLF)
    exit 1
Else
    ConsoleWrite("Success: " & $aCall[0] & @CRLF)
EndIf


If I ran the AU3-Script with SciTE I get the following output:

!>12:00:00 AutoIt3.exe ended.rc:-1073741783

Can someone point me into the right direction. I must admit, that I'm very new to handling DLL-Calls and structs.
But I've read down the forum threads and the AutoIt help.

Thanks in advance.

 

Edited by MagicSpark

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Mugen

where is the result parameter in your call?

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spudw2k

@MagicSpark I'm not an expert at DLL calls either, but I see that your fourth parameter (values) says it is expecting an array of values; so I'm not sure if providing a ptr is appropriate.  That's about the only hunch I have...sorry if it leads nowhere.

4 hours ago, Mugen said:

where is the result parameter in your call?

Should be optional per the description of the DLL function, yes?

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trancexx

^^ "Optional" doesn't mean optional in such way. What it really means is that (C/C++) compiler will generate the argument for programmer if omitted - as per definition.
Obviously, AutoIt is not C compiler, therefore "optional" means nothing here. It should be:

DllCall("C:\temp\test.dll", "int", "test_sender_send_values", _
    "str", "192.168.1.2", _
    "ushort", 80, _
    "str", "192.168.1.3", _
    "ptr", DllStructGetPtr($struct), _
    "int", 1, _
    "ptr*", 0)

If that fails for some reason, then calling convention should be changed to cdecl ("int:cdecl"), because it's not obvious from the OP what TEST_API is.

  • Like 2

♡♡♡

.

eMyvnE

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MagicSpark

Thank you so much!

Especially trancexx's post help me alot. The DllCall works now with these code changes:

DllCall("C:\temp\test.dll", "int:cdecl", "test_sender_send_values", _
    "str", "192.168.1.2", _
    "ushort", 80, _
    "str", "192.168.1.3", _
    "ptr", DllStructGetPtr($struct), _
    "int", 1, _
    "ptr*", 0)

I now try to get the other needed functions in that .dll to work by myself. ;) I get back to you, if I need further help.

Thanks again.

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      ;Credentials Manager #include <array.au3> #include <WinAPI.au3> ;Needed for the _WinAPI_GetLastError() ;------------------------------------------------------------------------ ;----- Add items into the Credentials Store ---------------------------- ;------------------------------------------------------------------------ ;~ _Cred_Add("MyCredStored", "ItsMe", "Secret1", "", 1) ;Add a Local Credentials so we can test the retrieval of a password ;~ $aAddCred = _Cred_Add("MyServer", "Domain\adminAccount", "MyS3cr3+P@ssw0rd") ;Add domain Credentials that can only be used with RDP and other such items ;~ _ArrayDisplay($aAddCred, "AddCred") ;------------------------------------------------------------------------ ;------------------------------------------------------------------------ ;----- Retrieve Credentials from the Credentials Store ----------------- ;------------------------------------------------------------------------ ;~ $aCreds = _Cred_Get("MyServer", 2) ;Retrieve Domain Cred's, won't have password in it ;~ _ArrayDisplay($aCreds, "Credentials") $aCreds = _Credentials_Enumerate() ;Get a list of all credentials currently stored on the system **(DOES NOT WORK)** ;------------------------------------------------------------------------ ;------------------------------------------------------------------------ ;----- Delete a Credential from the Credentials Store ------------------ ;------------------------------------------------------------------------ ;~ _Cred_Delete("MyServer") ;Delete the specified item from the Credential Store ;~ For $d = 1 to UBound($aCreds) - 1 ;~ _Cred_Delete($aCreds[$d][0]) ;Loop to delete all items found. **(DOES NOT WORK)** ;~ Next ;------------------------------------------------------------------------ ;================================================================================================ ;===== Add a Credential into the Credentials Store ============================================= ;================================================================================================ Func _Cred_Add($sTarget, $sUser, $sPassword, $sComm = "", $iType = 2) ;Type: 2=Domain, 1=Local Local $structTarget = DllStructCreate("wchar[100]") ; Create a structure to hold the Target object name DllStructSetData($structTarget, 1, $sTarget) ; Insert the target name into that Structure Local $structUser = DllStructCreate("wchar[100]") ; Create a structure to hold the UserName to use DllStructSetData($structUser, 1, $sUser) ; Insert the user name into the structure Local $structPwd = DllStructCreate("wchar[100]") ; Create a structure to hole the password to use DllStructSetData($structPwd, 1, $sPassword) ; Insert the password into the structure Local $structComment = DllStructCreate("wchar[100]") ; I don't see where this is used, but was in all the examples DllStructSetData($structComment, 1, $sComm) Local $structCREDENTIAL= "" & _ "DWORD Flags;" & _ "DWORD Type;" & _ "Ptr TargetName;" & _ "Ptr Comment;" & _ "UINT64 LastWritten;" & _ "DWORD CredintialBlobSize;" & _ "Ptr CredentialBlob;" & _ "DWORD Persist;" & _ "DWORD AttributeCount;" & _ "ptr Attributes;" & _ "Ptr TargetAlias;" & _ "Ptr Username" Local $NewCred = DllStructCreate($structCREDENTIAL) If @error Then MsgBox(0, "NewCred", "Error in DllStructCreate " & @error); Exit EndIf DllStructSetData($NewCred,"Flags",0) DllStructSetData($NewCred,"Type",$iType) ;2 = Domain, 1 = Generic DllStructSetData($NewCred,"TargetName",DllStructGetPtr($structTarget)) DllStructSetData($NewCred,"Persist",3) DllStructSetData($NewCred,"AttributeCount",0) DllStructSetData($NewCred,"UserName",DllStructGetPtr($structUser)) DllStructSetData($NewCred,"CredentialBlob",DllStructGetPtr($structPwd)) DllStructSetData($NewCred,"CredintialBlobSize",StringLen($sPassword)*2) DllStructSetData($NewCred,"Comment",DllStructGetPtr($structComment)) Local $hAdvapi32 = DllOpen("Advapi32.dll") If $hAdvapi32 = -1 Then Msgbox(0, "Error", "Failed to connect to the Credentials Store") Exit Endif $Ret = DllCall($hAdvapi32, 'bool', 'CredWriteW', 'ptr', DllStructGetPtr($NewCred), 'dword', 0) $NewCred = 0 If IsArray($Ret) Then Return $Ret Else Return SetError(1) EndIf EndFunc ;_Cred_Add ;================================================================================================ ;===== Retrieve the Credentials for the specified item ========================================= ;================================================================================================ Func _Cred_Get($sTarget, $iType = 1) ;Type: 2=Domain, 1=Local. CAN'T RETURN DOMAIN PASSWORDS!!! Local $FuncRet[3] Local $structTarget = DllStructCreate("wchar[100]") DllStructSetData($structTarget,1,$sTarget) Local $hAdvapi32 = DllOpen("Advapi32.dll") If $hAdvapi32 = -1 Then Msgbox(0, "Error", "Failed to connect to the Credentials Store") Exit Endif Local $Ret = DllCall($hAdvapi32, 'bool', 'CredReadW', 'ptr', DllStructGetPtr($structTarget), 'dword', $iType, 'dword', 0, 'ptr*', 0) if $ret[0]=0 then Return SetError(1,0,$FuncRet) Local $structCREDENTIAL= "" & _ "DWORD Flags;" & _ "DWORD Type;" & _ "Ptr TargetName;" & _ "Ptr Comment;" & _ "UINT64 LastWritten;" & _ "DWORD CredintialBlobSize;" & _ "Ptr CredentialBlob;" & _ "DWORD Persist;" & _ "DWORD AttributeCount;" & _ "Ptr Attributes;" & _ "Ptr TargetAlias;" & _ "Ptr Username" Local $tdata=DllStructCreate($structCREDENTIAL, $Ret[4]) Local $userName = DllStructCreate("wchar[100]", DllStructGetData($tdata, 'Username')) Local $User = DllStructGetData($userName, 1) Local $CredentialBlobSize = DllStructGetData($tdata, 'CredintialBlobSize') Local $credentialBlob = DllStructCreate("wchar[100]", DllStructGetData($tdata, 'CredentialBlob')) Local $Password = StringLeft(DllStructGetData($credentialBlob, 1), $CredentialBlobSize/2) Local $Comment = DllStructCreate("wchar[100]", DllStructGetData($tdata, 'Comment')) Local $Comm = DllStructGetData($Comment, 1) Dim $FuncRet[] = [$User, $Password, $Comm] Return $FuncRet EndFunc ;_Cred_Get ;================================================================================================ ;===== Delete a specified item from the Credentials Store ====================================== ;================================================================================================ Func _Cred_Delete($sTarget, $iType = 2) ;Type: 2=Domain, 1=Local Local $structTarget = DllStructCreate("wchar[100]") ;Create a structure to hold the object name we want to delete DllStructSetData($structTarget, 1, $sTarget) ;Insert the Object Name into the Structure Local $hAdvapi32 = DllOpen("Advapi32.dll") If $hAdvapi32 = -1 Then Msgbox(0, "Error", "Failed to connect to the Credentials Store") Exit Endif ;Now send all the info into the DLL to delete the item $Ret = DllCall($hAdvapi32, 'bool', 'CredDeleteW', 'ptr', DllStructGetPtr($structTarget), 'dword', $iType, 'dword', 0) ;$iType 2 = Domain, 1 = Local EndFunc ;_Cred_Delete ;================================================================================================ ;===== Return a 2D array with the Target, UserName, Password for every item ==================== ;===== in the Credentials Store ==================== ;================================================================================================ Func _Credentials_Enumerate() ;https://msdn.microsoft.com/en-us/library/windows/desktop/aa374794(v=vs.85).aspx ;https://www.autoitscript.com/forum/topic/99705-credenumerate-function-call/?do=findComment&comment=715159 Local $aResult Local $structCREDENTIAL = "DWORD Flags;" & _ "DWORD Type;" & _ "Ptr TargetName;" & _ "Ptr Comment;" & _ "UINT64 LastWritten;" & _ "DWORD CredintialBlobSize;" & _ "Ptr CredentialBlob;" & _ "DWORD Persist;" & _ "DWORD AttributeCount;" & _ "Ptr Attributes;" & _ "Ptr TargetAlias;" & _ "Ptr Username" $aResult = DllCall('advapi32.dll', 'int', 'CredEnumerateW', _ ;Call the Unicode version of CredEnumerate 'wstr', Null, _ ;Don't use any filter since I want everything returned 'uint', 1, _ ;1 = CRED_ENUMERATE_ALL_CREDENTIALS 'uint*', '', _ ;Return the Count of all stored credentials 'ptr*', '') ;Returns a pointer to an Array of pointers? If @error Or ($aResult[0] = 0) Then ConsoleWrite('Error: ' & @error & @TAB & 'Extended: ' & @extended & @CRLF) ConsoleWrite(_WinAPI_GetLastError() & @CRLF) ;1168 = Nothing matches the filter, 1312 = no credential set for this user, 1004 = Flag/Filter options are wrong Return SetError(1) EndIf ConsoleWrite("DllCall Returned = " & $aResult[0] & @CRLF & "Credential Count = " & $aResult[3] & @CRLF & "Pointer to Creds Array = " & $aResult[4] & @CRLF) For $c = 2 to $aResult[3] ;Create enough struct for each item in each credential found $structCREDENTIAL &= "DWORD Flags;" & _ "DWORD Type;" & _ "Ptr TargetName;" & _ "Ptr Comment;" & _ "UINT64 LastWritten;" & _ "DWORD CredintialBlobSize;" & _ "Ptr CredentialBlob;" & _ "DWORD Persist;" & _ "DWORD AttributeCount;" & _ "Ptr Attributes;" & _ "Ptr TargetAlias;" & _ "Ptr Username" Next Local $tdata = DllStructCreate($structCREDENTIAL, $aResult[4]) ;Insert all the data from the array of pointers into this struct Local $FullTarget = DllStructCreate("wchar[100]", DllStructGetData($tdata, 'TargetName')) ;Create and Get the array storing TargetName Local $userName = DllStructCreate("wchar[100]", DllStructGetData($tdata, 'Username')) ;Create and Get the array storing Username Local $CredentialBlobSize = DllStructGetData($tdata, 'CredintialBlobSize') ;Get the password blob Local $credentialBlob = DllStructCreate("wchar[100]", DllStructGetData($tdata, 'CredentialBlob')) ;Create and get the password text Local $Comment = DllStructCreate("wchar[100]", DllStructGetData($tdata, 'Comment')) ;Don't see a need for comments ;Retrieve the data For $c = 1 to $aResult[3] Local $Target = DllStructGetData($FullTarget, $c) ;Retrieve the Target Name from the item # Local $User = DllStructGetData($userName, $c) ;Retrieve the User Name from the item # Local $Password = StringLeft(DllStructGetData($credentialBlob, $c), $CredentialBlobSize/2) ;Retrieve the password, Only works for 1, legacy. domain creds will not return passwords Local $Comm = DllStructGetData($Comment, $c) ;Don't need comments but getting it since it's in all the examples ConsoleWrite("Loop = " & $c & ": Target = " & $Target & ": UserName = " & $User & ": Comment = " & $Comm & @CRLF) Next If $aResult[3] > 0 Then $aCreds = DllCall('advapi32.dll', 'none', 'CredFree', 'ptr', $aResult[4]) ;This is just used to release the pointer. Call when done EndIf EndFunc ;_Credentials_Enumerate  
    • luckyluke
      By luckyluke
      Hello,
      Im trying to read the output from CMD using Dllcall, here is my code:
      #include <WinAPI.au3> #include <array.au3> Global Const $STD_OUTPUT_HANDLE = -11 Global Const $_CONSOLE_SCREEN_BUFFER_INFO = _ "struct;int dwSizeX;" & _ "short dwSizeY;" & _ "short dwCursorPositionX;" & _ "short dwCursorPositionY;" & _ "short wAttributes;" & _ "short Left;" & _ "short Top;" & _ "short Right;" & _ "short Bottom;" & _ "short dwMaximumWindowSizeX;" & _ "short dwMaximumWindowSizeY;endstruct" $pCmd = Run( "cmd.exe" ) Sleep(1000) $hCmd = WinGetHandle("") ConsoleWrite('handle:' & $hCmd & @CRLF) $aRet = DllCall("kernel32.dll", "int", "AttachConsole", "dword", $pCmd) ;_ArrayDisplay($aRet) If $aRet[0] <> 0 Then $vHandle_data='' $vHandle='' $vHandle_data = DllStructCreate($_CONSOLE_SCREEN_BUFFER_INFO) ; Screen Buffer structure $aRet1 = DllCall("kernel32.dll", "hwnd", "GetStdHandle", "dword", $STD_OUTPUT_HANDLE) if not @error Then $vHandle = $aRet1[0] $aRet = DllCall("kernel32.dll", "int", "GetConsoleScreenBufferInfo", "hwnd", $vHandle, _ "ptr", $vHandle_data) MsgBox(0, '1',DllStructGetData($vHandle_data, 'dwSizeX') & _WinAPI_GetLastErrorMessage()) EndIf It did not work, i got the message 'The handle is invalid'. Please help?
      Thank you in advance!
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